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SubCool abt 0
I added 16 oz over 45 min time period and got very little reaction to subcool.
Both pressures came up a little each time i added but settled back to the org pressures and sat temp.
Dont have much exp with York but looks like the average system txv.

The question; is the system low based on temp and pressures.
coils are clean.

to be honest, the only numbers that are needed for troubleshooting are sh and sc. these are the two numbers needed. if you have 0 subcooling it means you are low on charge but we need sh to verify and it may lead us to need other info.

I assume you read the 105 F, and the Sat temp at 225 is 109.5 not 105 so you have subcooling of 4.5. The DT at the evap is 20 F very good. The 77 P at your evap seems a hair low with those numbers but could be ok. I would have thought it would be closer to 85 P meaning a temp of 50. I bet your superheat was high and when you added the refrg it droped. Is the CFM lower than 800? Sounds like it might be. Check your superheat you may need a little more refrig.